Exceptional powers of vocal imitation are sometimes developed. Vaudeville performers are by no means rare who can imitate the tones of the oboe, the clarinet, the muted trumpet, and several other instruments. Imitation of the notes and songs of birds is also a familiar type of performance. This peculiar gift of imitation results in each case from some special structure of the vocal organs. One performer can imitate the reed instruments, another the lighter brasses, and so on. Just what peculiar formation of the vocal organs is required for this type of imitative ability need not be inquired here. All that need be noted is, that the vocal organs must be so constructed as to be able to produce the particular quality of sound. Given this natural ability on the part of the vocal organs, the power to produce the tone quality is developed by repeated attempts at imitation. The possessor of the natural gift perfects this gift by practice. For practice in the imitation of sounds to be effective it is necessary that the ear be well acquainted with the tone quality to be reproduced. In addition, the practice must be guided by the performer listening closely to the sounds produced by the vocal organs, and constantly comparing these sounds to the tones of the instrument chosen for imitation.
This vocal imitation of instruments is not a normal ability; the tones of the oboe and trumpet do not lie within the range of qualities native to the normal voice. But the quality of the perfect vocal tone is unquestionably within the range of every voice so constituted as to be capable of artistic singing. A fine natural voice normally produces beautiful tones. It is only with this type of voice that Voice Culture is concerned. Such a voice must be capable of producing the perfect vocal tone. Can it learn to produce this quality of tone by imitation?
It cannot be questioned that the faulty tones of one voice can readily be imitated by another voice. Any one endowed with normal powers of speech can imitate a markedly nasal speaking voice. This is equally true of a nasal tone in singing, and of a strongly throaty tone as well. The more marked the fault of production the more readily it is heard and the more easily it can be imitated.
Let us imagine the case of a vocal teacher who undertakes to teach a gifted pupil by having the pupil imitate tones of faulty production, and gradually correcting the faults in the tones sung as a model for the pupil. The master is of course understood to have perfect command of his own voice. Suppose this master to begin the course of instruction by singing for the pupil tones of exaggerated throaty quality, and bidding the pupil to imitate these tones. Naturally, the pupil would have no difficulty in doing so. At the next lesson the master would very slightly improve the quality of the tones sung as a model for the pupil's imitation. The student would listen to these tones and model his daily practice accordingly. Just so soon as the student had succeeded in correctly reproducing this slightly less throaty tone the master would again set a slightly improved model.
With each successive step the master might eliminate, one by one, the faults of his own tone-production. Following the same course, the pupil would also gradually approach a correct model of tone. Finally, all the faults of tone-production having been corrected, both of master and pupil, the latter would be called upon to imitate perfect vocal tones. It would necessarily follow either that the student would successfully imitate the master's perfect tones or that at some point in this progress the student's imitative faculty would be found lacking.
Could any point be located at which the student would be unable to imitate the teacher's voice? This could certainly not be in the early stages of the course. Any one can imitate a very bad throaty or nasal tone. This being done, the imitation of a slightly less faulty tone would also present no difficulty. A second improvement in the master's model tone would again be readily imitated, and so on, with each succeeding correction of the faults of production. When the last trace of faulty production in the student's voice had been eliminated, he would be singing perfect tones. It is utterly impossible to define a point in this progress at which the pupil would be unable to imitate the teacher's voice. If a bad fault of production can be imitated, so can a comparatively slight fault. Further, if the pupil can correct his pronounced faulty production by imitating a tone not quite so faulty, so can he improve upon this tone by imitating a still better model of production. This process of gradual improvement by imitation must be capable of continuation until the last fault is eliminated. No limit can be set to the ability of the voice to improve its manner of tone-production by imitation. It must therefore be concluded that the perfect vocal action can be acquired by imitation.
In practical Voice Culture, learning to sing by imitation means simply the cultivation of the sense of hearing and the guidance of the voice by the ear. In other words, those vocal theorists who insist upon ear training commit themselves to the theory of imitative Voice Culture. What necessity is there of mechanical management of the vocal organs if the voice is to be guided by the ear? Even if mechanical management of the voice were possible it would be entirely superfluous. The voice needs no other guidance than the singer's sense of hearing.
Here another striking question is encountered: Why should the vocal organs be thought to be unable to adjust themselves for the tone quality demanded by the ear any more than for the pitch? No vocal theorist has ever thought to formulate rules for securing the tension of the vocal cords necessary for the desired pitch. This is always left to instinctive processes. No one would ever undertake to question the voice's ability to sing by imitation a note of any particular pitch. What valid reason can be given for denying the corresponding ability regarding tone quality?
Only one answer can be made to this question. The whole matter of mechanical vocal management rests on pure assumption. No scientific proof has ever been sought for the belief that the voice requires mechanical management. This necessity is always assumed, but the assumption is utterly illogical. The vocal organs adjust themselves for the imitation of tone quality by exactly the same psychological processes as for the imitation of pitch. Neither pitch nor tone quality can be regulated in any other way than by the guidance of the ear.
Imitation furnishes the only means of acquiring the correct vocal action. Several authorities on the voice admit the value of imitation, even though they also make much of the mechanical doctrines of modern methods. Sieber gives imitation as the best means of curing faults of production. "The best means to free the student of the three forms of faulty tone just described is possessed by that teacher who is able to imitate these faults with his own voice." (Vollständiges Lehrbuch der Gesangskunst, Ferd. Sieber, 1858.) Dr. Mills goes further and advocates the imitating of finished singers for the purpose of acquiring the correct vocal action. "The author would recommend all students who have begun a serious practical study of the registers to hear, if possible, some singer of eminence who observes register formation strictly." (Voice Production in Singing and Speaking, Phila., 1906.) Kofler even declares that imitation is an indispensable element of instruction. "It is just as difficult or impossible to learn to sing good tones without hearing the teacher's pure model tone as it is difficult or impossible to learn to speak without hearing." (The Art of Breathing, Leo Kofler, 1889.)